Operating Leases Operating Leases Other Information (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2019 USD ($)
Leases [Abstract]
Operating cash outflows from operating leases	$ 32,185
Right-of-use assets obtained in exchange for operating lease liabilities	$ 179,746
Weighted average remaining lease term, in years	5 years 4 months 24 days
Weighted average discount rate	4.80%